SRR1427161

This is a small-RNA (miRNA-Seq) library from mouse, sequenced on an Illumina HiSeq 2000, and it earns a solid B (83/100) as a fundamentally sound but caveated dataset. The grade is held up by excellent base quality — 94.7% of bases at Q30 and a mean base quality of 36.1, with essentially zero adapter contamination and negligible N content — meaning the underlying reads are accurate and clean enough for confident miRNA mapping and quantification. The one metric dragging the score down is an 88.67% duplication rate (scored 0/100), which flags heavy read redundancy; for a miRNA library this is partly expected, since a small repertoire of short mature miRNAs is sequenced deeply, but it still caps true library complexity and means the ~2.6M reads represent fewer unique molecules than the raw count suggests — a real limit if you need sensitive detection of low-abundance miRNAs. Note also that the headline counts (total reads/bases, checksum) are reported rather than independently measured and the evidence_strength is 1, so while the per-base quality metrics are genuinely measured, the complexity and yield read should be treated as provisional pending a deeper measured pass.